A (bird flu virus) may spread.Logical formLearned from18 sentences. A (polio virus) can be waterborne.Logical formLearned from18 sentences. A virus may undergo a dissemination.Logical formLearned from18 sentences. Outbreaks may pertain-to a (bird flu virus).Logical formLearned from18 sentences. A virus can be resilient.Logical formLearned from18 sentences. A (virus family) may cause a common cold.Logical formLearned from18 sentences. A virus may demonstrate power.Logical formLearned from18 sentences. An attack may use a virus.Logical formLearned from18 sentences. A virus may be replicated.Logical formLearned from18 sentences. A virus may be transmitted by food.Logical formLearned from17 sentences. An (avian virus) can be deadly.Logical formLearned from17 sentences. A (bird flu virus) may undergo a transmission.Logical formLearned from17 sentences. Concerns can be over a virus.Logical formLearned from17 sentences. Viruses may undergo an analysis.Logical formLearned from17 sentences. Bacteriophages can be viruses.Logical formLearned from17 sentences.